population dynamics

Question 1

what is a biological relationship

Answer 1

Relationships are connections between organisms.

These can occur within the same species or among different species.

These can either be positive (beneficial) or negative (detrimental) or neutral (no effect) on the organisms involved.

Question 2

The 3 main symbiotic relationships are:

Answer 2

mutualism, commensalism, and parasitism

Question 3

whats mutualism (symbiotic relationship)

Answer 3

Both species benefit.
Also known as symbiosis.

Species A (+)
Species B (+)

Question 4

whats commensalism (symbiotic relationship)

Answer 4

The presence of one species benefits another but it not harmed or benefitted from the relationship. This relationship is one-sided.

Species A (neutral)
Species B (+)

Question 5

whats parasitism (symbiotic relationship)

Answer 5

This is opposite to commensalism. The presence of one species is harmful on another but receives no effect.

Species A (neutral)
Species B (-)

Question 6

Exploitation

Answer 6

Species A (-)
Species B (+)

Question 7

Antibiosis (e.g. allelopathy)

Answer 7

One species benefits by producing a chemical compound or toxin that inhibits the growth of another organism.

Species A (+)
Species B (-)

Question 8

Competition

• habitat / area / niche
• food supply
• water access
• mate

Answer 8

Species compete for the same resources with both end up suffering especially when resources are limited.

Species A (-)
Species B (-)

Question 9

What is a niche in an ecosystem?

Answer 9

A location in the ecosystem where a species is usually found. For comfort and safety in finding food, water, and other factors to survive.

Question 10

Why is an organism suitable to its niche?

Answer 10

Because it has a role that will benefit the ecosystem.

Question 11

What happens if two organisms are found in the same niche?

Answer 11

They would be competing with each other. Leading to one organism dominating and one to migrate or die

Question 12

What is a food chain?

Answer 12

An outline of energy flow from a producer to a consumer or a set of consumers

A food chain illustrates how energy moves through an ecosystem.

Question 13

What is a food web?

Answer 13

A set of food chains in one ecosystem

A food web provides a more complex view of energy relationships than a food chain.

Question 14

Who provides energy to the consumer in a food chain?

Answer 14

Producer

Producers are typically plants that convert sunlight into energy.

Question 15

what are selective pressures

Answer 15

changes in either abiotic factors or biotic member of the ecosystem. They ‘pressure’ organisms to adapt in response to survive.